The varieties of spinel are divided according to the colors. They are generally categorized into the following varieties:
(1) Red Spinel: It is also called Balas Ruby, which refers to the red, pink red, rose red transparent spinel, easily taken for ruby.
(2) Orange Red Spinel: The red spinel with yellow hue.
(3) Blue Purple Spinel: Red, purple and blue one after another, the transparent spinel taking on blue purple hue on the whole.
(4) Blue Spinel: The blue transparent spinel, the color is often from dark...
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